I hate my new job

Here's the thing, I recently started a new job! I'm two months in and I am finding myself super stressed out and thinking this type of job isn't for me. I'm a registered nurse that has worked inpatient for more than 13 years! I switched to infusion center and loved that for a bit but the exposure of chemotherapy hit me hard after I lost my baby at 23 weeks! I'm a desk nurse administrator that manages inbox messages but I also do another role as a nurse navigator with new referrals. I thought I would like it since you have the options to work from home but I really miss doing inpatient and being hands on! This desk role is also really tough for me! I'm training and I feel so lost and like I am constantly needing guidance. Inbox messages are no joke! I think if I were good at it, things would make so much more sense but during my training, I feel so dumb all the time. Some messages, I don't even know what to do or how to response! I feel so lost with my life right now like I almost don't even want to work altogether and just take some time off. Makes me worried about the future but at this point, family is super important to me. I have two little ones and working 40 hours a week isn't allowing me that chance to be with them as much as I want. I really want to quit but the pension is holding me back...what to do? I almost wanted to go back to inpatient working 2 days a week but that manager offered me the job a month after I accepted the new job so I did not feel like it was appropriate to bail from the new job! I feel like I have lots of regrets now! What should I do????